package com.dp.utils;

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

@Component
public class RedisIdWorker {
    public static final long BEGIN_TIMESTAMP = 1735689600L;
    //序列号的位数
    public static final int COUNT_BITS=32;

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    public  long nextId(String KeyPrefix){
        //生成时间戳
        LocalDateTime now = LocalDateTime.now();
        long nowSecond = now.toEpochSecond(ZoneOffset.UTC);
         long timestamp =  nowSecond- BEGIN_TIMESTAMP;
        //生成序列号
        //获取当前日期，精确到天
        String data = now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));
        long count = stringRedisTemplate.opsForValue().increment("icr" + KeyPrefix + ":" + data);
        //拼接并返回
        return  timestamp << COUNT_BITS | count;     
    }

    public static void main(String[] args) {
        LocalDateTime time = LocalDateTime.of(2025, 1, 1, 0, 0, 0);
        long second = time.toEpochSecond(ZoneOffset.UTC);
        System.out.println("second = " + second);
    }
}
